<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width: 800px;
            height: 60px;
            background: lightgreen;
            display: flex;
        }
        .box li{
            list-style: none;
            width: 140px;
            height: 60px;
            text-align: center;
            line-height: 60px;
            border: 1px solid red;
        }
        .box1{
            width: 800px;
            height: 500px;
            background: lightcoral;
        }
    </style>
</head>
<body>
    <div class="box">
        <li>商品介绍</li>
        <li>商品介绍</li>
        <li>商品介绍</li>
        <li>商品介绍</li>
        <li>商品介绍</li>
    </div>
    <div class="box1"></div>
    <script>
        var oLi = document.querySelectorAll('li');
        for(var i=0;i<oLi.length;i++){
            oLi[i].onclick = function(){
                document.box1.style.
            }
        }
    </script>
</body>
</html>